How severe is CVE-2024-43398?

CVE-2024-43398 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2024-43398 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-43398?

CVE-2024-43398 primarily affects Ruby-lang Rexml. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2024-43398?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2024-43398 have an EU (EUVD) identifier?

Yes. CVE-2024-43398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2666.

When was CVE-2024-43398 published?

CVE-2024-43398 was published on 2024-08-22 and last updated on 2026-06-17.

CVE-2024-43398

CVE-2024-43398 is a medium-severity vulnerability in Ruby-lang Rexml with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-776.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-2666
Weakness: CWE-776
Affected product: Ruby-lang Rexml
Published: 2024-08-22
Last modified: 2026-06-17

Description

REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. The REXML gem 3.3.6 or later include the patch to fix the vulnerability.

Frequently asked questions

What is CVE-2024-43398?: REXML is an XML toolkit for Ruby. The REXML gem before 3.3.6 has a DoS vulnerability when it parses an XML that has many deep elements that have same local name attributes. If you need to parse untrusted XMLs with tree parser API like REXML::Document.new, you may be impacted to this vulnerability. If you use other parser APIs such as stream parser API and SAX2 parser API, this vulnerability is not affected. The REXML gem 3.3.6 or later include the patch to fix the vulnerability.
How severe is CVE-2024-43398?: CVE-2024-43398 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2024-43398 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-43398?: CVE-2024-43398 primarily affects Ruby-lang Rexml. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-43398?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2024-43398 have an EU (EUVD) identifier?: Yes. CVE-2024-43398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-2666.
When was CVE-2024-43398 published?: CVE-2024-43398 was published on 2024-08-22 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:ruby-lang:rexml:*:*:*:*:*:ruby:*:*
cpe:2.3:o:netapp:bootstrap_os:-:*:*:*:*:*:*:*

More vulnerabilities in Ruby-lang Rexml

CVE-2024-49761 — High (CVSS 7.5): REXML is an XML toolkit for Ruby. The REXML gem before 3.3.9 has a ReDoS vulnerability when it parses an XML that has…
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CVE-2025-58767 — Medium (CVSS 5.3): REXML is an XML toolkit for Ruby. The REXML gems from 3.3.3 to 3.4.1 has a DoS vulnerability when parsing XML…
CVE-2024-41946 — Medium (CVSS 5.3): REXML is an XML toolkit for Ruby. The REXML gem 3.3.2 has a DoS vulnerability when it parses an XML that has many…
CVE-2024-41123 — Medium (CVSS 5.3): REXML is an XML toolkit for Ruby. The REXML gem before 3.3.2 has some DoS vulnerabilities when it parses an XML that…
CVE-2024-35176 — Medium (CVSS 5.3): REXML is an XML toolkit for Ruby. The REXML gem before 3.2.6 has a denial of service vulnerability when it parses an…

All CVEs affecting Ruby-lang Rexml →

Other CWE-776 vulnerabilities

CVE-2019-19144 — Critical (CVSS 9.8): XML External Entity Injection vulnerability in Quantum DXi6702 2.3.0.3 (11449-53631 Build304) devices via…
CVE-2022-23640 — Critical (CVSS 9.8): Excel-Streaming-Reader is an easy-to-use implementation of a streaming Excel reader using Apache POI. Prior to…
CVE-2014-2228 — Critical (CVSS 9.8): The XStream extension in HP Fortify SCA before 2.2 RC3 allows remote attackers to execute arbitrary code via unsafe…
CVE-2013-4335 — Critical (CVSS 9.8): opOpenSocialPlugin 0.8.2.1, > 0.9.9.2, 0.9.13, 1.2.6: Multiple XML External Entity Injection Vulnerabilities
CVE-2021-23926 — Critical (CVSS 9.1): The XML parsers used by XMLBeans up to version 2.6.0 did not set the properties needed to protect the user from…
CVE-2020-24590 — Critical (CVSS 9.1): The Management Console in WSO2 API Manager through 3.1.0 and API Microgateway 2.2.0 allows XML Entity Expansion attacks.

Browse all CWE-776 vulnerabilities →